12571440477 has 8 divisors (see below), whose sum is σ = 16768780416. Its totient is φ = 8377530432.

The previous prime is 12571440467. The next prime is 12571440481. The reversal of 12571440477 is 77404417521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12571440477 - 2⁴ = 12571440461 is a prime.

It is a super-2 number, since 2×12571440477² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12571440437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848908 + ... + 863589.

It is an arithmetic number, because the mean of its divisors is an integer number (2096097552).

Almost surely, 2^12571440477 is an apocalyptic number.

It is an amenable number.

12571440477 is a deficient number, since it is larger than the sum of its proper divisors (4197339939).

12571440477 is a wasteful number, since it uses less digits than its factorization.

12571440477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714947.

The product of its (nonzero) digits is 219520, while the sum is 42.

Adding to 12571440477 its reverse (77404417521), we get a palindrome (89975857998).

The spelling of 12571440477 in words is "twelve billion, five hundred seventy-one million, four hundred forty thousand, four hundred seventy-seven".